How to Convert an Image to ICO
Published September 9, 2026 · 2 min read
An ICO file isn't just a renamed image — it's a container that can hold several resolutions of the same icon, so Windows and browsers can pick the sharpest one for each context. This tool builds a real multi-resolution ICO, not a single-size fake.
Try Image to ICOSteps
- 1
Open the Image to ICO tool
Go to the ICO converter.
- 2
Upload your image
Choose a square image or logo to convert.
- 3
Choose sizes
Pick the recommended multi-resolution bundle (16–256 px), or a single specific size if that's all you need.
- 4
Download the ICO file
Save the finished .ico file.
Frequently asked questions
Different contexts — a browser tab, a desktop shortcut, a taskbar — request different icon sizes, and a multi-resolution ICO lets the system pick the sharpest version available for each, rather than scaling one size up or down.
This tool builds just the ICO file itself; the Favicon Generator produces a complete web favicon package including PNG sizes and a manifest, built around the same multi-resolution ICO technique.
A square image with simple, clear detail, since ICO icons are typically viewed quite small.
Because the ICO container is built properly with real multiple resolutions, the result looks sharp everywhere an ICO file gets used, not just at one fixed size.